Past Continuous Tense with EX

Hatsune still can't figure it out. Just now she was the overtime dog in the code, and she suddenly returned to Silver Tree Middle School, back to her senior year in high school. Everything surrounding her was still familiar recipes and familiar flavors, but it was a strange time and space. In her senior year of high school, she remembered that she was about to meet that scumbag, Liu Xiyan, for the first time. The culprit who indirectly caused her to survive in her thirties turned out to be the only person of her kind who she could cuddle up with for warmth in the lonely and confused parallel world. Why is it just her and him...